@erezshabtai: yes the operation pattern you described can be achieved by OSBee. The only question is if OSBee is capable to open/close two valves together. This depends on whether the 2200uF capacitor on the circuit board can store sufficient charge to open / close two valves. I haven’t done any tests myself, but I am pretty sure it can. If it turns out to be not very reliable, you can always replace the 2200uF capacitor with something bigger, like 4700uF or even 6800uF, and I am sure those would be more than enough to drive two valves. Other than that there is no issue connecting multiple valves to the same port.